Regulating mechanism



Dec. 11 1923.

F. H. BROWN REGULATING MECHANISM 'Filed May 22,

mula

Patented Dec. 11, 1923.

UNITED STATES PATENT OFFICE.

FRANCIS H. BROWN, 0F GLEN OLDEN, PENNSYLVANIA, ASSIGNOR T0 PETROLEUMHEAT AND POWER COMPANY. OF BOSTON. MASSACHUSETTS, A CORPORATION OFDELAWARE.

REGULATING MECHANISM.

Application flcd May 22.

To all fiom [i muy conce/'lz' Br it known that I, Fun-is ll. lnotvx, aritixen of the United -States, residingr atv (ih-u (lldrn. in the countyot' Delaware and State of Ieii1is ,'l\'ania, have invented anImprovement in Regulatilngr Meehanisin, 'of which the following;description, in ronneetion with the uveotnpanying drawings` is asperiliration, lilte rharneters on the drawingsl itpresentinp1 likeparts.

The invention to he hereinafter desrribed relates to regulatingnurhanisrn adapted to be used in ronnertion with furnaces of straingenerators and fory other purposes.

In regulation of rolnliustion ronditions it is desirable that theapparatus .shall be reA sponsive to a pluralit)` of-fartors, such. Forexample, as variations in the pressure of the steam developed h5' thtlgenrratm, and variations in the pressure of thtl kinetir steam or thesteam flowingr from the treiterator in arrordanre with the load ordemand thereon. t; is desirable that. the apparatus shell be sensitiveto slight variations in the pressure. and that these variations muy beemployed to regulate the` supply of fuel, the draft or other conditionsattendintr conibustion. but that the apparatus shall have snicient powerpositivelyv to control the means regulated thereby.

Une of the purposes` of the present invention. therefore, is to providea inerlmnisin u'hrh will lw responsive to a plurality oli ronditions orfzntors, suclx, tor example. as miriations in stutir and linetirpressure olA the steam developed b v n generator. and roti trol thesuppl)- of motive llnid to a motor wliirlrivill furnish suliieient powerposi'- tively to operate the. instruunntalitv to be controlletflthereby.

In the present instaure of the invention, the motor is in 'the forni ofa v vlindrr rontaining: a piston I1nd providrd with :i pilot valve lorcontrollingr the supply ol' ronn pressed nir or other motive lluid tothe rylinder. It` is desirable tluit the piston shall he Inot'd in tlu't- Vlinder with a vaiving length of trawl depending upon tlnI extent ofrontrol required. lu other words` it is' desirable. that tht` pistonshall he moved a certain amount and then autom?.tit-Tail)4 arrested, andthe point of' arrest 4should be varied from time to time,

Another purpose of the invention. there- 1920. Serial No. 383,553.

Fore, is to provide simple and efficient means whirh may beoperated bymovement of the motor or piston automatically to arrest the sinne asrequired, and this arrest may oerur after the pilot valve has beenshifted by either of the devices responsive to variations in static andkinetic steam pressure.

With the aforesaid and other purposes in view, the character of theinvention may he best understood b v reference to the tollowing,rdesrription of one good forni there ol shown in the aecotnpanyinerdrawing, wherein:

Fig. l is a front elevation of a regulating nirrhanisni embodyingr theinvention, certain parts thereof being shown in seetion;

Fig. 2 is a horizontal section taken on line Q--Z of Fig. 1: i

Fig. it is a horizontal section taken on line It-- of Fig. l; and

Fig. 4 on an enlarged Scale is a perspective view of parts shown in Fig.1.

Referring to the drawing, any suitable l'orm of motor may be enn'iloyed,in the present instance, com rising a cylinder 1 containing;` a piston 3connected by a stem 5 with n fratrie 7 guided in extensions on thetvlinder 1 antlprovided with upper and lower eyes 9 and l1 adapted to heconnertted to an).r regulating instrunu-ntality to be rontrolledthereby, sut-h, for example, as valve nu-rhanisn for rontrollinplr thefeed olq tnel to tlulurnare, and dempers for controlling tlu` draftl'orthe furnace.

tit designates the sti-ani main ot a steam vgenerator u'hirh ma)` be ol'any suilablr t'orin oll well known eonstrurtion, and there' fore, it` isunnerrssury to show the sanie herein. .'\n oriliee device l5 may bemountA ed in this strani main, desiralily ol` the ron- `motion disclosedin my ropendinirl appli ration Serial No. 368,665, tiled Marra 25,liljtl.

As stated, vthe nlotor tnt15v be operatedin response to varyingrconditions, but for purposes ot' exempliliration, in the presentinstanre, the motor is operated in response to variations in Statie andkinetit steam pres sure. l

'lhe devre responsive to static Steam pres sure, in the presentinstaure. f -oniprises a raising 17 containing: a. diaphragm t9. saideasing being conveniently mounted dirertly beneath the cylinder 1. Theupper side of bil tho diaplrragm 19 muy 'oe suiijevleci to variotions instativ pressure or' the stumm through u pipe 2l communicating with the'italic pressure side of the orifice fiorire i5. miei pipe beingprovided with u usual vulve 23.

The device responsive lo variations in kinrtiv pressure of the strana,in the present. instaura. romprisos u (using 25 containing a dinphrugrm27, the upper sirio of which muy iw suizjortwl to variations in liinrticSteam pressure through u pipo 29 rommuuieating: with liua orivv of rhofiorire l5. Said pipe living proriilrfii willi :i Hsu-.1i valve. 3i.

Kim-lio pressoir muy he ohtuinwl within the pipe 2li h v forming thooriiiro device l@ so lhu. cormnuuiuulmi provided hotwnen the and of he'pipo S29 and the inner periphery of the orifice in the elevire l5. thourrangement iii-ing Sur'u that ilu. pressure will he taken at ihr point.whore thv Srum pusszs through the oriiiiig Qim'f nl. this point thepressure vario iu urrrirunro with the flow of Strani .incl static priSura? may hu oliu ruime] wihiu iw pipe hy forming the. orifice ilrvirolli with ports lending frmn our or iiolz Siders of lim oriiire derive inihu @u1-l of tho pipe El that ih@ prpssure may he token to one sirio oftho path of travel of the steam through tho nrioe in the device l5, allas more fully set forth in the application above mentioned.

It is fiesimbio that the. opmsite sirius of the diaphragmsr 19 and i??shall be suljeoted to ulvielziing` pressure in opposition to the si'aticund kinetic pressures on the 11p-- per sides thereof. To nrfompiishthis, iii the present instance, a cylinder 33 muy he provided containingun inverted cup 35 and adapted to be filled with waiter or other liquidso i0 leave en air cushion 37 in (he Pup. The (fusing may communicatewith the unrlrr sirio of tho diaphragm lll und the uurior sido of thvdiaphragm 3T rvspvrtivoly through iaruurh piper fill und il ronnorifilin lui-n hy :i pipo #i3 with the rau-ing 33. o: id hrunrh i'iiponliving: prmiilsul willi fn-iwi: 45 and 4T.

li is llrnirulnle tlml ho oir ruuhinn shall be subjertod to aprodotormined working pressure which may dosirnhly he ho workingpressure of the steam desired in the main 13. To establish this pressurein the casing a pipe 49 muy he provided having one end communicatingwith the pipe 21 referred l@` and its other end communicating with theeasing 33 the pipe 49 being' provided with a usual valve 5L Thesonstruction is such that 'when the valvrs. 23 und 51 are opened, thecasing' S3 will ho suhjeved to the otatif pressure of the steam in themain 13, and n fr this pressure has heen established in said casing. thevalve. 51 mag,y

be rinsed so as to maintain the same therein,

and the lower sides of the diaphragme, 19

uufi will iio .suhiocted o this presure upon owning ihr; mirra 45 und4T.

lf liuI prrsruris nhovo iii/e diaphragme; l9 und 2T @Quill thopredetermined working prossurv Psluhlishr on Lim vir-.hing the fliabphi-umm will remain slutioumy. hufif tho slutir und .kinotir prvssurvguhmm said (liajlz-lirugm rim. ohwo or full below such pressur@` ihrllinplsz'ufium will 'nu morvil ncf -orfl ingly.

oxwns'ihlv liuii fi? Wih u. rohe loros* 59 pirolzilly vomir-riad lo rhodiaphragm E9 :mil fuirrurnml sin liu? f. 711mg; il". Tho pppn siii-sruil oi' the lavar 35i )non u lifflirsuiii( (il pirotuil f' mounieiiiin-'erwin ilu-1 urn@ izl of said lifelrrmik living; minfin-toll hy ulink $5 with rho rmi of the piloi miro (i7 mounted on the oyiinlier l,for controlling the supply of motivo liuid o said cylinder from anysuitahle source. Since this pilot valve muy he of weil knownoonstruction, it is unueoessary to show and (inscribe tho sumo in dotail herein.

ThoY other arm 69 of -zhe bell-crank may be pivoluily connected by alink TU to one end of u rausmilting lever '71 fulorumeli intormediatoits (and on n. roch arm Til fuhfruined on n hrm-.liet oonveuieullymounted on an extrusion of the lower houd ol lim ffyliuiier l. The rockuriu may have un arm TT projectingr oubsnnliuily nl righi inging therefrom romiecllod hv un elwnsilllo link 7? with u Volw loro!" R1 Viwilullymuni-tml lo iiw. diaphragm 2f um! iuirroinvl m this ing 25.

Tho urinoir* und of the. lruuuniiiliugr lover 73. may he connected by s.link or member 83 wilh #he upper end nf o rock arm or stand arri B5having its lower mul pivofully mouuted on u bracket: 87 convenientlymound on an extension of the lower head of the cylinder 1.

Pivotaily mounted on the standard is a shoe. 89 having' an inclined bar91 slidably mounted therein, ille lowor par?, of said bar beingpivotally wounded to and carried by a bracket 92 ou the reviprocatoryframe 7 referred to. This bar may he ser at digerent angie@ of adjusmeutwith raisport. to said flume by un adiustingr screw 93.

Tri operation.l variations in static steam prosfmra will berransmitl'prl through the pipe. 2l to lelieV upper side of ihe diaphragmlOD tween the Sscond preure actuawd means fund a different partiva afthe transmtngf leven u. lever mnlmted in be ed lawfully by the tmvel ofSuid pisteimi mul n comme@ time between Snx last mennned lever amd x1hll particu of the xanmitag lifafr m pa :1 cunntemctng mm'eml to the plmlve n wn move'wm of tml pstnn,

4. The cum )inalion of a cylinder', u pistcm therein. n frame, mmmecfifm' movvmnt by the piston, u pilot valve fm.' flrffllng the supply ofnmtiw ud tu the cylinder, pref sure actunt'ecl means for {'qmrutng thepilot alvv, :1 Sevmxci und inclepcneu, {areasure actuated means,lmnpmatng tlm pilot valve?, und means fur m'tmling the pilt valve in sefaponse tu th(J cemxnual mgon uf th@ twv@ pmxsum uct'uuwl mama` and'issn in epfms? from mail! rock am: tu said. llel-ffmnk to www-.w theplint mlm.

In elelxmouy f'llerefs l huw signe my msm@ to lus. specifciitlonAFRANCIS H.. BRWN.

